Add sqlite3 back to bug templates that need it

The sqlite3 gem was removed during the merging of main and gem
templates, but the resulting templates still depend on it.

Author: skipkayhil

guides/bug_report_templates/action_mailbox.rb

@@ -10,6 +10,8 @@
   gem "rails"
   # If you want to test against edge Rails replace the previous line with this:
   # gem "rails", github: "rails/rails", branch: "main"
+
+  gem "sqlite3"
 end
 
 require "active_record/railtie"

guides/bug_report_templates/active_record.rb

@@ -10,6 +10,8 @@
   gem "rails"
   # If you want to test against edge Rails replace the previous line with this:
   # gem "rails", github: "rails/rails", branch: "main"
+
+  gem "sqlite3"
 end
 
 require "active_record"

guides/bug_report_templates/active_record_migrations.rb

@@ -10,6 +10,8 @@
   gem "rails"
   # If you want to test against edge Rails replace the previous line with this:
   # gem "rails", github: "rails/rails", branch: "main"
+
+  gem "sqlite3"
 end
 
 require "active_record"

guides/bug_report_templates/active_storage.rb

@@ -10,6 +10,8 @@
   gem "rails"
   # If you want to test against edge Rails replace the previous line with this:
   # gem "rails", github: "rails/rails", branch: "main"
+
+  gem "sqlite3"
 end
 
 require "active_record/railtie"